- Kärdla is a city located on the island of Hiiumaa in Estonia. It is the largest city and the capital of Hiiumaa County. Kärdla has a population of around 3,500 people. The city is known for its cozy atmosphere, beautiful nature, and rich cultural heritage. It is a popular tourist destination, especially for those seeking a peaceful and idyllic getaway. Kärdla offers various attractions and activities, including visiting historical sites, exploring the surrounding countryside, hiking, and enjoying the local cuisine.